Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"circumstellar matter"”.
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Luminous - Early Interactive Type II Supernovae
In this thesis we present a new set of ultraviolet, optical and near infrared data for 5 type II-IIp Supernovae (i.e. SNe 2007od, 2009bw, 2007pk, 2009dd and 2010aj) and analyze them together with 3 other well studied objects (i.e. SNe 1993ad, 1995ad and 1996W) from Padua archive. These 8 objects …
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Dust disks around hot white dwarfs and central stars of planetary nebulae
… belts through collisions, (2) formation of circumstellar dust disks through binary interactions. In addition, we have derived basic dust disk parameters using simple blackbody approximations, or optically thin dust disk models with realistic grain and disk properties. The dust disk physical …
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The Structure and Polarization Properties of the SiO Masers in the Extended Atmosphere of R Aquarii
… dominated by stellar pulsations and permeated by circumstellar shocks. This dissertation presents the results of a multi-epoch VLBI study of the v=1, J=1-0, 43-GHz SiO maser emission towards the symbiotic binary R Aquarii. Four epochs of full-polarization observations were recorded using the Very …
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Analysis of Molecular Variability Due to Accretion Bursts in the Protoplanetary Disk of Ex Lup as Observed with the James Webb Space Telescope
Protoplanetary disks are structures that form around a pre-main sequence star as a result of conservation of angular momentum during collapse of dense cores in star-forming regions. They accrete gas onto the central proto-star, and are the sites of planet formation. Early in their lifetime, disk …
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Investigating the presence and properties of circumstellar material in Type I Supernovae
… two projects that seek to answer the role that circumstellar material plays in both core-collapse and thermonuclear supernovae, including its effects on single objects both in the generation of spectroscopic signatures and additional luminosity through interaction with supernova ejecta. As well …
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The influence of stellar birth environment on protoplanetary disc dispersal
Protoplanetary discs (PPDs) are the progenitors of planets and represent the material available for their formation. Recent surveys indicate that exoplanetary architectures are diverse and the processes that govern the evolution of PPDs contribute significantly to the properties of these …